The original bill made it illegal to manufacturer and sell magazines larger than 15 rounds. However when Magpul threatened to pull up stakes the bill was modified to allow for manufacture but no retail sales in CO of magazines larger than 15 rounds. I think Magpul's reply was if you ban sales we're leaving anyway because CO would still require a serial number on every may larger than 15 rounds for proof of manufacturer date. I imagine it wouldn't take long to relocate to Cheyenne, and WY would be happy to have them.